US PATENT SUBCLASS 502 / 432
.~.~.~.~ Specified atmosphere


Current as of: June, 1999
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502 /   HD   CATALYST, SOLID SORBENT, OR SUPPORT THEREFOR: PRODUCT OR PROCESS OF MAKING

400  DF  SOLID SORBENT {6}
416  DF  .~ Free carbon containing {3}
418  DF  .~.~ Process utilizing solid or liquid source carbonizable material, or product thereof {9}
430  DF  .~.~.~ Treating with gas {2}
432.~.~.~.~ Specified atmosphere {2}
433  DF  .~.~.~.~.~> Including free oxygen {1}
435  DF  .~.~.~.~.~> Exposure to hot flue or exhaust gas


DEFINITION

Classification: 502/432

Specified atmosphere:

(under subclass 430) Process in which the composition of the gas is recited.

(1) Note. The claim may recite an upper limit or a range of percentages.